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godot-docs/classes/class_semaphore.rst
2018-01-04 01:49:18 +01:00

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.. Generated automatically by doc/tools/makerst.py in Godot's source tree.
.. DO NOT EDIT THIS FILE, but the Semaphore.xml source instead.
.. The source is found in doc/classes or modules/<name>/doc_classes.
.. _class_Semaphore:
Semaphore
=========
**Inherits:** :ref:`Reference<class_reference>` **<** :ref:`Object<class_object>`
**Category:** Core
Brief Description
-----------------
A synchronization Semaphore.
Member Functions
----------------
+------------------------+-----------------------------------------------+
| :ref:`int<class_int>` | :ref:`post<class_Semaphore_post>` **(** **)** |
+------------------------+-----------------------------------------------+
| :ref:`int<class_int>` | :ref:`wait<class_Semaphore_wait>` **(** **)** |
+------------------------+-----------------------------------------------+
Description
-----------
A synchronization Semaphore. Element used to synchronize multiple :ref:`Thread<class_thread>`\ s. Initialized to zero on creation. Be careful to avoid deadlocks. For a binary version, see :ref:`Mutex<class_mutex>`.
Member Function Description
---------------------------
.. _class_Semaphore_post:
- :ref:`int<class_int>` **post** **(** **)**
Lowers the ``Semaphore``, allowing one more thread in. Returns OK on success, ERR_BUSY otherwise.
.. _class_Semaphore_wait:
- :ref:`int<class_int>` **wait** **(** **)**
Tries to wait for the ``Semaphore``, if its value is zero, blocks until non-zero. Returns OK on success, ERR_BUSY otherwise.